looking for a 20# downrigger ball mold

[bigdogeh]

Like the title says, I'm looking for a 20# downrigger ball mold. Anyone know where to source one? can be new. was hoping to get one that makes a 20# ball similar to the one in this thread...
http://www.sportfishingbc.com/forum/index.php?threads/cannonballs-for-sale-15lb-20lb-finned.62762/